Added white list user filter
Merge branch 'master' into white-list

Conflicts:
	build.gradle
Merge branch 'master' into white-list

Conflicts:
	src/main/groovy/com/pca/Twitter.groovy
	src/test/groovy/com/pca/AcceptanceTest.groovy
	src/test/groovy/com/pca/TwitterTest.groovy
Fixed build after merge